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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
barrel length vs. powder usage
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<blockquote data-quote="lloydsmale" data-source="post: 891200" data-attributes="member: 41442"><p>magnummainiac is right in that barrel lenght means litte to nothing when it comes to picking a powder. What works in a 7mag using a 28 in barrel is going to work in a 20 inch barrel. Most of the powder is burned before the bullet clears the chamber. Heavier bullets can take advantage of slower powders because it takes more to get them moving so it gives a slow powder a nano second more to burn. Like i said ive loaded for the 7 mag for many years. Ive found that with 140s and 150s 4831 will give me all the velocity that can be had. Step up to 160s and powders like 7828 and re22 do real well. I dont load 175 bullets. I use my guns for hunting and never saw what there was to be gained by using a bullet that heavy. Maybe in a 7 ultra but in my opinion the 7mag is most effecient with 150-160 grain bullets for hunting. I could care less which grouped better at a 1000 yards. I hunt deer not paper targets. you have to keep in mind that even 4831 is a slow burning powder. When i started loading it was the slowest powder available to us. Just like with all the new super duper deer bullets that the new guys just have to have. the powder manufactures get in on it too. They push super slow powders best used in a 50 bmg and convince us we need them for a bloody 2506. When in fact good old cup and core bullets and some 4831 still makes most cartridges, even the magnums run at top efficentcy in the deer fields. Some guys look for the last fps they can get. they will do about anything to gain 50 fps. Me i load even magnums for accuracy. Id much rather have a load that does 3000 with a 150 and shoots 1/2 inch groups then one that shoots 3200 and shoots 2 inch groups. Yes i admit ive fooled with retumbo, h1000 and re25 and still use a little re25. But i use it for heavy bullet loads in the 300 ultra. Ive tried all three in about every magnum round going and keep comming back to 4831 in the 7 mag. It gives top velocitys and top accuracy with hunting weight bullets.</p></blockquote><p></p>
[QUOTE="lloydsmale, post: 891200, member: 41442"] magnummainiac is right in that barrel lenght means litte to nothing when it comes to picking a powder. What works in a 7mag using a 28 in barrel is going to work in a 20 inch barrel. Most of the powder is burned before the bullet clears the chamber. Heavier bullets can take advantage of slower powders because it takes more to get them moving so it gives a slow powder a nano second more to burn. Like i said ive loaded for the 7 mag for many years. Ive found that with 140s and 150s 4831 will give me all the velocity that can be had. Step up to 160s and powders like 7828 and re22 do real well. I dont load 175 bullets. I use my guns for hunting and never saw what there was to be gained by using a bullet that heavy. Maybe in a 7 ultra but in my opinion the 7mag is most effecient with 150-160 grain bullets for hunting. I could care less which grouped better at a 1000 yards. I hunt deer not paper targets. you have to keep in mind that even 4831 is a slow burning powder. When i started loading it was the slowest powder available to us. Just like with all the new super duper deer bullets that the new guys just have to have. the powder manufactures get in on it too. They push super slow powders best used in a 50 bmg and convince us we need them for a bloody 2506. When in fact good old cup and core bullets and some 4831 still makes most cartridges, even the magnums run at top efficentcy in the deer fields. Some guys look for the last fps they can get. they will do about anything to gain 50 fps. Me i load even magnums for accuracy. Id much rather have a load that does 3000 with a 150 and shoots 1/2 inch groups then one that shoots 3200 and shoots 2 inch groups. Yes i admit ive fooled with retumbo, h1000 and re25 and still use a little re25. But i use it for heavy bullet loads in the 300 ultra. Ive tried all three in about every magnum round going and keep comming back to 4831 in the 7 mag. It gives top velocitys and top accuracy with hunting weight bullets. [/QUOTE]
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barrel length vs. powder usage
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